Metal briquet.



FELIX A. VOG-EL, OF NEW YORK, N. Y., ASSIGNOR TO GENERAL BRIQUETTING COMPANY,

. OF NEW YORK, N. Y., A CORPORATION OF MAINE.

Patented Apr. 8, 1919.

METAL Bare-om.

1,299,878, Specification of Letters Patent.

No Drawing.

To all whom it may concern:

Be it known that I, FELIX A. VoeEL, a

citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in the Manufacture of Metal Briquets, of which the following is a specification. v

The invention relates to the manufacture of metal briquets and has for its object the production:- of such briquets from materials which are brittle, stiff, hard or in other condition which resists briqueting. Heretofore the only satisfactory process of briqueting metals known to me is that which results from the use of the process and press of the type patented toRonay. The briqueting principle upon which Ronay operates is that of attrition between contiguous sur-- faces under conditions which exclude, so far as possible, the presence of air. between the contacting surfaces wherebythe particles to be .briqueted seem to be unified with "each other so as to constitute an almost integral mass. This process, excellent as it is, does not operate upon brittle, stiff or highly tempered metals such, for example, as shrapnel shell-borings, shavings, turnings, nickel, steel and the like, material of which there is a large supply but which has resisted all efl'orts at successful priqueting. When such shavings, borings or the like are passed through a Ronay press, they do notseem to cohere permanently and even if a briquet of slight cohesion should result, the briquet would contain all the dirt and foreign matter which is carried by-the borings. Upon investigation I find that one reason for the lack of success in briqueting such materials is. the etc., w ich originate from the process by which the borings are obtained. These. oils,

etc., permeate the borings and tend to prevent the metallic particles from coming into direct contact with each other.. I also find that the material being extremely brittle and stiff, or when highly tempered, does not permit the individual metal particles from coming into contact with other articles of the same metal under the condltions which should prevail in a- ,Ronay ress, to wit, such that surface contact of su stantial area be- 7 tween adjacent metal particles should take place in such a way that the intermediate volume of air is, so far as possible, driven the material under treatment. perature should be such that upon approresence of cutting oil, soap water,

Application filed October 26, 1918. Serial No. 259,805.

, eluding springs and other metals having a hlgh carbon content, as well as alloys such as chrome-nickel-steel and other metals possessing the non-briqueting properties which I have described, I proceed as follows:

The brittle, stiff borings are first reduced in size, preferably by passing them in their brittle state through an edge runner or rolls, I then subject the metals or alloys thus reduced in size to heat. The particular degree of heat employed will depend upon the nature of the cutting oil or soap water or other greasy constituent of the metal particles. The temperature should in each case be sufficient to bring about incineration or combustion of the oil, 'etc. Speaking generally, a temperature of approximately 600 F. more or less will produce the desired result although, as explained, this temperature may be higher or lower, depending upon the nature of the constituent tobe eliminated. In those cases where the metal is extremely hard as, for example, in the case of shell steel, the temperature is raised until the metal becomes cherry red which in this instance would be 1350 F. In the case of other very hard metals or alloys the requisite temperature will depend upon the nature of The tem priate cooling of anon-tempering character the material will be annealed. The resultof this treatment is: first, to destroy all the dirt and foreign matter present; second, the complete elimination of the cutting oil; and third, to take the temper out of the metal or to anneal it.

The metal particles can now be introduced into a'Ronay press and lend themselves er fectly to the production of permanent riuets. A small proportion of a corrosive %such as water, acid or other agent which affects the surface of the metal particles) may in some cases be advantageously added to the mass.

I claim: 1. In the art of preparing metal briquets,

that improvement which consists in subjecting metal waste, such as turnings or borings in the brittle state to size-reducing crushing and then subjecting the pieces thus produced to a temperature of 600 F. more or less preparatory to their introduction into the briqueting press.

2. In the art of preparing metal briquets, that improvement which consists in first by crushing in the brittle state reducingthe size of the component parts of brittle or stiff metal waste, such as turnings or boring s, and then subjecting the crushed particles to an annealing'temperature preparatory to their introduction into the briqueting press.

3. In the art of preparing metal briquets, that improvement which consists in a treatment of brittle or stiff metal Waste, such as tu'rnings or borings, whereby dirtand foreign substances are destroyed and the cutting oil removed therefrom and the metal made available for briqueting, said treatment comprising the subjection of the metal particles in the brittle state to size-reducing crushing and then subjecting the pieces thus produced to an annealing temperature followed by cooling of anon-tempering character prepan atory to the introduction of the metal into the briqueting press.

In testimony whereof I have hereunto set my hand.

FELIX A. VOGEL. 

